Write API for JsonProvider

[ovatsus]

Allow to construct and/or modify typed JSON objects

Before reading the rest, see fsprojects/FSharpx.Extras#196 for the start of this thread

[rojepp]

+1. Preferably in a streaming fashion to avoid memory use.

[davidgrenier]

I prefer a declarative approach akin to XLinq and the markup combinators present in WebSharper.

If the type provider could generate camel or Pascal case functions that reflect the schema.

InvoiceDetailRequest [
    InvoiceDetailRequestHeader [
        invoiceId "X2235"
        InvoiceDetailHeaderIndicator [
            ...
        ]
    ]
    InvoiceDetailOrder [
        InvoiceDetailOrderInfo [
            ...
        ]
    ]
    InvoiceDetailOrder [
        InvoiceDetailOrderInfo [
            ...
        ]
    ]
    InvoiceDetailOrder [
        InvoiceDetailOrderInfo [
            ...
        ]
    ]
    InvoiceDetailSummary []    
] |> string

My personal use case is for cXML which uses DTD, even though it's dated I'm undecided at the time if it would be better to invest time on adding DTD support or just trust the schema inference which seemed to work well with sample cXML files.

[panesofglass]

Retrieve default vega specs that could be modified and sent through VegaHub for rendering in a browser. @mathias-brandewinder and I were discussing the merits of trying to use the JsonProvider or writing and maintaining a library of DUs and records to match the vega grammar and spec samples.

[ovatsus]

On fsprojects/FSharpx.Extras#196 there's a couple of alternative for an immutable write API. It would be great if you could make an example with the kind code you want to write.

[ovatsus]

Here is another use case for it:
http://luketopia.net/2013/10/06/xml-transformations-with-fsharp/

[forki]

Anybody planning to implement this?

[ovatsus]

I was planning on doing the simple scenario (just adding constructors) soon. Is that enough for you?

[forki]

My use case is:

I have a sample like:

{
    "id":1,
    "target_branch":"master",
    "source_branch":"test1",
    "assignee":{
        "id":1
    }
}

I want to overwrite the properties and post it to an url.

[ovatsus]

Would this work for you?:

type JsonT = JsonProvider<"Sample.json", RootName="Operation">
new JsonT.DomainTypes.Operation(2, "someBranch", "someOtherBranch", new JsonT.DomainTypes.Asignee(3))

Or do you get that sample from somewhere at runtime and then need to override one of the properties and then send back?

[forki]

No, this would work.

At the moment I'm doing: